Measurement of the processes e+e-→e+e- and e+e-→γγ at PETRA

W. Bartel*, L. Becker, C. Bowdery, D. Cords, R. Eichler, R. Felst, D. Haidt, H. Krehbiel, B. Naroska, J. Olsson, P. Steffen, P. Warming, G. Dietrich, E. Elsen, G. Heinzelmann, H. Kado, K. Meier, A. Petersen, U. Schneekloth, G. WeberS. Bethke, A. Dieckmann, J. Heintze, K. H. Hellenbrand, R. D. Heuer, S. Komamiya, J. von Krogh, P. Lennert, H. Matsumura, H. Rieseberg, A. Wagner, A. Bell, A. Finch, F. Foster, G. Hughes, T. Nozaki, H. Wriedt, J. Allison, A. H. Ball, G. Bamford, R. Barlow, I. P. Duerdoth, I. Glendinning, F. K. Loebinger, A. A. Macbeth, H. McCann, H. E. Mills, P. G. Murphy, P. Rowe, K. Stephens, D. Clarke, R. Marshall, G. F. Pearce, J. B. Whittaker, J. Kanzaki, T. Kawamoto, T. Kobayashi, M. Koshiba, M. Minowa, M. Nozaki, S. Odaka, S. Orito, A. Sato, H. Takeda, T. Takeshita, Y. Totsuka, Y. Watanabe, S. Yamada, C. Yanagisawa



40 被引用数 (Scopus)


Cross sections for the reactions e+e-→e+e- (Bhabha scattering) and e+e-→γγ are measured for center-of-mass (c.m.) energies {Mathematical expression} between 12.0 and 34.6 GeV. The results agree with the predictions of Quantum Electrodynamics (QED) and the cut-off parameters are determined. From Bhabha scattering at the highest energy, {Mathematical expression}, the 1 δ limits 0.12<sin2 θ{symbol}w<0.38 are obtained for the weak mixing angle. The higher order (α3) QED processes e+e-→e+e-γ and e+e-→γγγ are also studied and are found to agree with the α3 QED predictions. A search for excited electrons is carried out by investigating the (e±γ) invariant mass distribution in the reaction e+e-→e+e-γ.

ジャーナルZeitschrift für Physik C Particles and Fields
出版ステータスPublished - 1983 9

ASJC Scopus subject areas

  • 物理学および天文学(その他)


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